NAEP Technical DocumentationSummary Response Rates for the NAEP 2010 Geography National Assessment

Summary item response rates, geography national assessment, by item type and grade: 2010
Grade	Statistic	Multiple-choice items	Dichotomous constructed-response items	Polytomous constructed-response items
† Not applicable. ¹ Missing responses includes the categories "omitted" and "not-reached." ² An "off-task" response (constructed-response items only) is a response that is unrelated to the question and is considered inappropriate. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2010 Geography Assessment.
4	Number of items	61	2	27
	Average percent missing¹	7.86	22.84	8.72
	Minimum	0.69	6.65	1.41
	Maximum	47.30	39.02	28.87
	Average percent off-task²	†	0.89	0.23
	Minimum	†	0.37	0.00
	Maximum	†	1.41	0.99
	Average weighted proportion correct	55.21	34.11	45.09
8	Number of items	86	1.00	37
	Average percent missing¹	3.08	3.13	6.56
	Minimum	0.04	3.13	0.36
	Maximum	19.96	3.13	33.89
	Average percent off-task²	†	0.79	0.70
	Minimum	†	0.79	0.07
	Maximum	†	0.79	2.38
	Average weighted proportion correct	54.26	56.91	38.44
12	Number of items	87	†	36
	Average percent missing¹	3.85	†	13.73
	Minimum	0.37	†	1.77
	Maximum	35.51	†	52.05
	Average percent off-task²	†	†	0.79
	Minimum	†	†	0.00
	Maximum	†	†	3.14
	Average weighted proportion correct	55.38	†	33.19

Last updated 06 January 2016 (GF)